Rolling metal shutter.



No. 682,304. Patented Sept. I0, 19m. J. 6. WILSON.

ROLLING METAL SHUTTER.

(Application filed. July 18, 1901.)

(No-Model.)

WITNESSES:

JAMES G. WILSON, OF NEW YORK, N. Y.

ROLLING METAL SHUTTER.

SPEGIFICATIDN forming part of Letters Patent No. 682,304, datedSeptember 10, 1901.

Application filed July 18, 1901. Serial No. 68,818. (No model.)

To aZZ whom it may concern.-

Be it known that 1, JAMES GODFREY Win SON, a subject of EdwardVlI, Kingof Great Britain, residing at New York, in the county and State of NewYork, have invented certain new and useful Improvements in Rolling MetalShutters; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to certain improvements in rolling metal shutters,and has especial reference to the manner in which the slats are formedand secured together, with the end in view that the shutter shall beexceedingly strong and durable, while the friction and consequent wearagainst the sides and ends of the slats shall be reduced to a minimum.

In order that those skilled in the art to which my invention appertainsmay more fully understand the same, I will proceed to describe itsconstruction andoperation, referring by numerals of reference to theaccompanying drawings, which form a part of this application, and inwhich- Figure 1 is a front elevation showing a portion of a rollingshutter constructed in accordance with my improvement. Fig. 2 is a sideelevation of the construction shown at Fig. 1; and Fig. 3 is a viewsimilar to Fig. 2, except that the shields are removed.

Similar numbers of reference denote like parts in the several figures ofthe drawings.

I-Ieretofore it has been common to make rolling shutters from a rigidpiece of corrugated steel. Also rolling shutters have been constructedfrom scroll-shaped slats, whose upper and lower edges were curledaround, so as to afford interlocking parts, whereby the slats may beconnected together. Also it has been common to provide shields onpertions of the face of the rigid corrugated steel shutter for thepurpose of taking up the wear against said face, and it has also beencommon to interlock the curled edges of shutterslats and to provide earswhich extend across the ends of these interlocking portions, so as toprevent the latter from becoming disengaged.

Myimprovement aims to provide a shutter which shall possess all theadvantages of the constructions above referred to, and in additionthereto shall be protected as against wear in a novel and efficientmanner, as will be evidenced from the description to which attention isnow called.

The slats of my improved shutter are S- shaped in that they have twoconcave-convex portions 1 2, which extend in reverse directions andwhich are joined at the center of the slat. The upper and lower edges ofthe slat are curled, so as present hook-like formations 4 5, Whose freeends point toward each other and are adjacent, respectively, to theconvexities of the parts 1 2 at the points Where said convexities at thetop and bottom of the slat begin. It will therefore be clear that theconcavo-convex portions 1 2 are wholly contained between the horizontalplanes of the free ends of these hooks, and accordingly when the slatsare interlocked in the manner shown in the drawings there can be nocramping, nor can there be any obstruction to the free movements of theslats at their joints and the full benefit of the corrugation isobtained. Upon the convex surfaces at the ends of alternate slats of theshutter are secured shields 6, which are metal pieces of suitable formand thickness that are riveted or otherwise fastened upon said surfaces.From these shields ears 7 extend immediately across the ends of theinterlocking hooks of the slats, so as to prevent the latter frombecoming disengaged. As before stated, the slats are joined or hingedtogether by sliding one hook element lengthwise into the hook element ofanother slat, and therefore it will be clear that when these shields arein position with the ears extending immediately across the ends of theinterlocked portions of the slat the latter cannot possibly becomedisengaged, while at the same time the friction of the shutter in thegroove of a door or Window casing at the sides is greatly lessened,since only one-half of the slats touch the walls of these grooves. Alsowhen the shutter is rolled up the wear is wholly sustained by alternateslats, and as the latter are protected in the manner heretoforeexplained it follows that my improved shutter is not only light anddurable, but may be very easily operated, owing to the fact that I havereduced the friction to a minimum. It is absolutely necessary that theshields should be affixed to the convex surfaces, since if they werefastened to the concave surfaces they would perform no useful functionwhatever and would simply make the shutter heavier without any attendingbenefits.

I do not wish to be understood as laying any claim'whatever to themanner of joining the slats together, since this is very common and hasbeen practiced fora great many years by various manufacturers in thiscountry and abroad; but I do wish to emphasize the fact that I believemyself to be the first to utilize a corrugated shutter in the form ofslats hinged together, so that pronounced corrugations in each slat areWholly contained between the horizontal planes of the hinging orinterlocking at the top and bottom of the slat. Furthermore, I alsodesire to call especial attention to the fact that I believe myself tobe the first to reduce the wear to a minimum and to secure theinterlocked slats by providing alternate slats only with shields on thetwo convex surfaces of each slat and by extending from these shieldsears, which lie -ing their extremities at the top and bottom formed intohooks capable of interlocking, the free ends of which hooks extendtoward each other while the concavo-convex portions of the S-shapedslats are contained wholly between the horizontal planes of said freeends, substantially as set forth.

3. A rolling shutter composed of a series of metal slats, each slathaving two reverselydisposed concavo-convex portions which are joinedtogether at the center of the slat, the ends of each slat at the top andbottom being formed into hooks capable of interlocking, the free ends ofwhich hooks extend toward each other and are in horizontal planes whichinclose the reversely-disposed concavo-convex portions, substantially asset forth.

4. A rolling shutter composed of a series of metal slats, each slathavingreversely-disposed concavo-convex portions, the upper and loweredges of each slat being formed into hooks capable of interlocking,while the convex surfaces of alternate slats are provided with metalshields having ears which extend across the ends of the interlockinghook elements, substantially as set forth.

5. A rolling shutter composed of a series of metal slats hingedtogether, each slat having reversely-disposed concavo-convex portionswhereby an S shape is presented in crosssection, the convex surfaces ofalternate slats at the ends thereof being provided with metal shieldswhich latter also extend beyond the ends of said alternate slats andoverlap the ends of the hinged portions, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JAS. G. l/VILSON.

Witnesses:

LESTER GODFREY WILSON, HOWARD M. BOYD.

